This compound, known as Cidofovir hydrate, is an antiviral medication primarily used in the treatment of cytomegalovirus (CMV) retinitis and other infections caused by herpesviruses in immunocompromised patients, such as those with AIDS. As an acyclic nucleoside phosphonate analog, it mimics natural nucleotides and is incorporated into viral DNA, where it inhibits viral DNA polymerase and causes chain termination, thereby preventing viral replication. Its role is crucial in managing opportunistic viral infections and has been studied for broader applications against DNA viruses.